However this important trust be conferred, it is important that its duration should be fixed at a very brief period, incapable of being ever prolonged. In the crises which lead to its adoption, the State is either soon lost, or soon saved; and, the present need passed, the dictatorship becomes either tyrannical or idle. At Rome, where dictators held office for six months only, most of them abdicated before their time was up. If their term had been longer, they might well have tried to prolong it still further, as the decemvirs did when chosen for a year. The dictator had only time to provide against the need that had caused him to be chosen; he had none to think of further projects.